Finding the Fourth Proportional to 2,129,639.56, 2,938,863.18 and 1,211,848.36
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Solution
The fourth proportional to 2,129,639.56, 2,938,863.18 and 1,211,848.36 is: 1,672,328.31
Step by Step Solution
- Step 1: Write the proportion equation
2,129,639.56 : 2,938,863.18 = 1,211,848.36 : x - Step 2: Convert to fraction form
2,129,639.56/2,938,863.18 = 1,211,848.36/x - Step 3: Cross multiply
2,129,639.56x = 2,938,863.18 × 1,211,848.36 - Step 4: Simplify right side
2,129,639.56x = 3,561,456,524,947.39 - Step 5: Solve for x
x = 3,561,456,524,947.39/2,129,639.56 - Step 6: Final answer
x = 1,672,328.31
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.